Boring-tool



G. C. BECK.

BORlNG TOOL.

APPLICATION men JULY 2. ma.

1,326,169. Patented. Dec. 30,1919.

3 SHEETS-SHEET I.

v INVENTOR ATTORNEY G. C. BECK.

BORING TOOL.

APPLICATION man JULY 2. ma.

Pmfiented Dec. 30,1919.

3 SHEETS-SHEET 2.

Hill IIHIF I INVENTOR W %I f BY /roman G. C. BECK.

BORING TOOL.

APPLICATION man JULY 2.191s.

Patented Dec. 30, 1919.

3 SHEETSSHEET 3- BY 2:, [WWTTORNEY GEORGE C. BECK, ,OF SPOKANE, WASHINGTON.

BORING-TOOL.

- Application filed July 1918.

To all whom it may concern:

Be it known that I, GEORGE C. BECK, a citizen of the United States ofAmerica, residing at Spokane, in the county of Spokane and State of l/Vashington, have invented new and useful Improvements in Borlng- Tools, of which the following is a specification.

This invention pertains to boring tools and has for its object to provide an improved means for boring and reboring cylinders of engines, pumps and other piston cylinders. The different elements going to make up the improved tool will be hereinafter described and illustrated in the accompanying drawings.

Figure 1, is a broken-away side elevation of the improved boring tool, together with a. vertical sectional View of a broken-away portion of a cylinder, the boring head of the tool being shown in two positions one of which is by dotted line.

Fig. 2, is a broken-away edge view of the boring tool, together with a broken-away sectional View of a cylinder.

Fig. 3, is an enlarged top plan view of the boring head.

Fig. l, is an enlarged bottom view thereof.

Fig. 5, is an enlarged side-view thereof.

F 6, is a vertical sectional View thereof taken on the line 66 of Fig. 3.

Fig. 7, is a detail plan view of a tying plate entering into the construction of the boring head.

Fig. 8, is a sectional View taken on the I line 8-8 of Fig. 7.

Fig. 9, is a top plan view of a guide for the shaft of the boring head, together With a broken-away view of the support therefor.

Fig. 10, is a vertical sectional view taken on the line 10l0 of Fig. 9.

Fig. 11, is a detail side View of one of the spreader blocks entering into the construction of the boring head, the same being the block carrying the cutting tool.

Fig. 12, is a detail edge view of the same.

Fig. 13, is a detail side view of one of the spreader blocks, that does not carry a cutting tool.

Fig. 14, is an edge view of the same.

Fig. 15, is a top plan view of a vertical beveled spreading block, or nut, entering into the construction of the boring head, and

Fig. 16, is a side elevation thereof.

Specification of Letters Patent.

Patented Dec. 39, 1919.

Serial No. 243,054.

. 21 and 22 are held vertically in position by means of plates and 26, secured to the same by means of screws 27, the plates overlapping the bearings 19 and 20. The bearings 19 and are supported by a frame 28. A threaded follower 29 comprising substantially a half cylinder engages the threaded shaft 17 between the bearing 19 and a bracket 30 reaching from the frame 28. The follower 29 is held in position by two thumb screws 31 and 32, having bearings in the frame 28 at 33 and 3 1 and having threaded ends 35 turned into cars 36 on the sides of the follower 29. Coil springs 37 encircle the thumb screws 31 and 32 between the points 33 and 3d of the frame 23 and the cars 36 on the follower 29. The boring head 38 is fed into the cylinder 39 for the purpose of boring out the same by means of the rotation of the shaft 17 by the man ual operation of a crank attached thereto or by the rotation of the wheel 40, the shaft 17 being forced downward or upward by means of the threaded connections with the follower 29. Free vertical action of the shaft 17 will be given by the releasing of the follower 29 from the threaded engagement with the shaft 17 by loosening the thumb screws 31 and 32, the coil springs 37 serving to force the follower 29 away from the threads on the shaft 17. This will permit of drawing the boring head 38 out of the cylinder 39 without having to resort to the tedious process of rotatingthe shaft 17. The boring tool is secured in working position over the cylinder 39 by means of a plate 11 which is secured to the cylinder 39 by means of bolts 42 extending through the plate 41 and into threaded openings 43 already provided in the cylinders for other use. i A bar 44 is secured by the bolts 4-2 and adds to the rigidity of the fastening means. To this plate 41 the frame 28 is secured by means of bolts 45, dowel pins 16 connecting the frame 28 and the plate 41, also adding to the rigidity of the connections.

Referring now to the detailv construction of the boring head 38, reference is had to Figs. 8 to 16 inclusive.

A. heavy circular nut at? (Fig. 6) with the lower portion thereof beveled as at 18, is threaded onto the shaft 17 near the bottom thereof and has provided in the top surface thereof openings d9 into which a key may be inserted by means of which the nut 17 is rotated to change its position on the shaft 17. To the bottom of the shaft 17 is threaded a plate 50, having radial slots 51 provided therein. Blocks 52 having beveled sides 53 are slidably fastened to the plate 50 bymeans of bolts 541: passed through the slots 51 and threaded into o' 'ienings 55 in the bloc rs 52. The beveled sides 53 correspond with the beveled side 48 of the nut 17 and the blocks 52 are so assembled with the other parts that the two beveled surfaces come together as shown in Fig. 6. A. cylindrically formed shell 56, open on one side as at 57 (Fig. 5) is set around the plate 50 and extends upwardly for a distance of two or three inches. ()ne of the blocks 52 is secured to the shell 56 by means of screws 58 turned into the threaded openings 59. One of the blocks 52 is mounted in the plate 50 so as to be opposite or directly in front of the opening 5'!" in the shell 56 and to this block is secured a vertically arranged cutter 59 adapted to extend outwardly to a point beyond the outer edge of the shell 56. The cutter 59 is held in, position by means of an over-lapping plate 60, held in position by screws 61 turned into the threaded openings 62 in the block 52. The cutter 59 is adjusted as to cutting capacity by means of a tapered key 63 adjusted between the knife 59 and the block 52.

The shell 56 is adjusted to the wall of the cylinder to be bored by a means for spreading the same, which comprises the adjustment of the nut 17 on the shaft 17, the beveled surface a8 operating against the beveled surface 53 on the blocks 52, and the blocks 52 hearing against the shell 56. A. scale 64: on the upper surface of the nut 17 gaged to the key-way 65, said scale being lined to a one one-thousandth of an inch, serves as a guide to the operator in the spreading process. The dotted lines on Fig. 1 indicate the position of the parts of the boring head when in operation in the cylinder 39, the

shaft 17 being 17*, the nut 17, 45 the knife 59, 59, the screws 61, 61, the bolts 54: 54 and the plate 50, 50.

After a cylinder has been bored out as by a boring tool of the character herein described, it is desirable to have a means for removing the metal particles and dust and for polishing the inner surface of the cylin der. I accomplish this purpose by means of an emery cloth 66, which I attach to the outer surface of the shell 56 by means of pins 67 at the inner edge of the opening in the shell 56 on one side and a hook 68 at the inner edge 011 the other side. The emery cloth 66 is pressed down over the pins 67 and into the opening 69 formed by the hook 68, then a pin 7 0 is inserted in the opening 69 over the cloth 66 and serves to bind the same within the hook. Offsets 71, adjacent and paralieling the slots 51 in the plate 50, are made to fit grooves 72 in the blocks 52. This mechanism serves to make more secure and rigid the connecting mechanism.

What is claimed is:

1. A boringhead comprising a circular shell separated on one side, a cutter mount ed within said shell and protruding through the shell at the separated point and means for spreading said shell and adjusting said cutter.

2. A boring head comprising a circular shell separated on one side, a cutter mounted within said shell and protruding through the shell at the separated point, and means for spreading said shell which comprises a nut threaded on a support within said shell and having a beveled surface, blocks in said shell mounted in contact therewith and having beveled surfaces corresponding with the beveled surface of said nut, and means for moving said nut on said support to spread said blocks.

3. A boring head surrounded by a shell having a circular surface separated at one side, and means for securing an emery cloth around said shell and means for expanding said shell. V

41. A boring head surrounded by a shell having a circular surface separated at one side, means for securing an emery cloth around said shell, which comprises pins on the inner edge of one side of the separation in said shell and a hook on the inner edge of the other side of said separation, and a pin adapted to be inserted in said hook, and means for expanding said shell.

In testimony whereof I afiix my signature in the presence of two witnesses.

GEORGE C. BECK.

Witnesses:

J. E. McANDRnw, L. L. WESTFALL. 

